Intel® Processor and Intel® Core™ i3 N-Series

Datasheet, Volume 1 of 2

ID 759603
Date 01/04/2023
Version 001
Document Table of Contents

Signal Description

Display is divided between processor and PCH. The processor houses memory interface, display planes, pipes, and digital display interfaces/ports while the PCH has transcoder and analog display interface or port.

The PCH integrates digital display side band signals AUX CH, DDC bus, and Hot-Plug Detect signals even though digital display interfaces are moved to processor. There are two pairs of AUX CH, DDC Clock/Data, and Hot-Plug Detect signals on the PCH that correspond to digital display interface/ports.

Auxiliary Channel (AUX CH) is a half-duplex bidirectional channel used for link management and device control. AUX CH is an AC coupled differential signal.

The DDC (Digital Display Channel) bus is used for communication between the host system and display. Seven pairs of DDC (DDP*_​CTRLCLK and DDP*_​CTRLDATA) signals exist on the PCH that correspond to four digital ports on the processor. DDC follows I2C protocol.

The Hot-Plug Detect (HPD) signal serves as an interrupt request for the sink device for DisplayPort* and HDMI*. DDC and HPD signals are muxed with GPIO pads that can be independently configured to 1.8 V or 3.3 V via soft straps. Therefore, depending on soft strap settings for the corresponding GPIO pads, DDC and HPD signals can support either 1.8 V or 3.3 V.

Digital Display Signals

Name Type Description
GPP_​E14 / DDSP_​HPDA / DISP_​MISCA I Display Port A : HPD Hot-Plug Detect.
GPP_​A18 / DDSP_​HPDB / DISP_​MISCB I Display Port B : HPD Hot-Plug Detect.
GPP_​A19 / DDSP_​HPD1 / DISP_​MISC1 I Display Port 1 : HPD Hot-Plug Detect.
GPP_​A20 / DDSP_​HPD2 / DISP_​MISC2 I Display Port 2 : HPD Hot-Plug Detect.
GPP_​A14 / USB_​OC1# / DDSP_​HPD3 / DISP_​MISC3 I Display Port 3 : HPD Hot-Plug Detect.
GPP_​A15 / USB_​OC2# / DDSP_​HPD4 / DISP_​MISC4 I Display Port 4 : HPD Hot-Plug Detect.
GPP_​E22 / DDPA_​CTRLCLK / DNX_​FORCE_​RELOAD I/O Display Port A : Control Clock.
GPP_​E23 / DDPA_​CTRLDATA I/O Display Port A : Control Data.
GPP_​H15 / DDPB_​CTRLCLK / PCIE_​LINK_​DOWN I/O Display Port B : Control Clock.
GPP_​H17 / DDPB_​CTRLDATA I/O Display Port B : Control Data.
GPP_​E18 / DDP1_​CTRLCLK I/O Display Port 1 : Control Clock.
GPP_​E19 / DDP1_​CTRLDATA I/O Display Port 1 : Control Data.
GPP_​E20 / DDP2_​CTRLCLK I/O Display Port 2 : Control Clock.
GPP_​E21 / DDP2_​CTRLDATA I/O Display Port 2 : Control Data.